CN212873452U - Drawing device generally used for right-handed or left-handed use - Google Patents
Drawing device generally used for right-handed or left-handed use Download PDFInfo
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- CN212873452U CN212873452U CN202022288773.8U CN202022288773U CN212873452U CN 212873452 U CN212873452 U CN 212873452U CN 202022288773 U CN202022288773 U CN 202022288773U CN 212873452 U CN212873452 U CN 212873452U
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Abstract
The application relates to a drawing device generally used for right-handed or left-handed use, which comprises a touch screen module, a touch screen panel and induction units, wherein the induction units are uniformly distributed on the touch screen panel and used for inducing the pressing position of a pressure induction pen; the main body module comprises a shell and a CPU (central processing unit) positioned in the shell; the hot key module comprises a plurality of hot keys connected to the shell, and the CPU is provided with a plurality of functional units; two function units coupled by the same hot key are called a function unit group, two hot keys positioned at a symmetrical point are respectively called a hot key A and a hot key B, the hot key A and the hot key B are coupled to the same function unit group, the hot key A controls one function unit in the corresponding function unit group, and the hot key B controls the other function unit in the corresponding function unit group; and the switching module comprises a switch arranged on the shell. The present application has the effect of being suitable for both left-handed and right-handed users.
Description
Technical Field
The present application relates to the field of electronic drawing, and more particularly, to a drawing device that is generally used for right-handed or left-handed use.
Background
In the art drawing field, there are multiple electronic drawing devices with wide application, and the common devices include a digital board, a drawing board, a hand drawing board, etc., and the device usually consists of an induction board and a pressure-sensitive pen, which is one of computer input devices.
The drawing device is mainly used for design type office workers as a drawing creation aspect, like a drawing board and a painting brush of a painter. The vivid picture and lifelike characters common in the movie are drawn by one stroke on the induction board, and the drawing function is comparable to that of a keyboard and a mouse.
However, because there are far more right-handed people than left-handed people, drawing devices are generally designed for right-handed users and are not convenient for left-handed users, and thus there is a need for improvement.
SUMMERY OF THE UTILITY MODEL
In order to enable the drawing device to be suitable for both left-handed and right-handed users, the application provides a drawing device that is generally used for either right-handed or left-handed use.
The application provides a drawing device that general is used to conventional right hand or left hand and uses, adopts following technical scheme:
a drawing device for general right or left handed use, comprising:
the touch screen module comprises a touch screen plate and sensing units uniformly distributed on the touch screen plate, wherein the sensing units are used for sensing the pressing position of a pressure sensing pen;
the main body module comprises a shell and a CPU (central processing unit) positioned in the shell, wherein one side of the shell is provided with an opening which is called as an opening side, and the other side of the shell is closed; the touch screen plate is connected to the opening side of the shell and coupled with the CPU;
the hot key module comprises a plurality of hot keys connected to the shell, the figure formed by the arrangement of the hot keys is a centrosymmetric figure, the CPU is provided with a plurality of functional units, and each hot key is coupled to two different functional units simultaneously; two function units coupled by the same hot key are called a function unit group, two hot keys positioned at a symmetrical point are respectively called a hot key A and a hot key B, the hot key A and the hot key B are coupled to the same function unit group, the hot key A controls one function unit in the corresponding function unit group, and the hot key B controls the other function unit in the corresponding function unit group;
and the switching module comprises a switching switch arranged on the shell, and the switching switch is coupled between the function unit and the hot key and is used for interchanging the function units controlled by the hot key A and the hot key B.
By adopting the technical scheme, when the left hand and the right hand are switched, the whole drawing device is firstly rotated by 180 degrees, and at the moment, the position of the hot key rotates along with the shell and rotates from the habitual position of the right hand to the habitual position of the left hand, so that a user of the left hand can conveniently use the drawing device;
then, a change-over switch is pressed, for a hot key module, after the drawing device is integrally rotated by 180 degrees, all hot keys are rotated to the position of the left dominant hand, but the positions of the hot keys are reversed after the hot keys are rotated, for example, one hot key is used, the hot key and the function unit represented by the hot key are positioned at the upper left positions of all the hot keys in the right dominant hand state and are rotated to the lower right positions of all the hot keys, so that the inconvenience for the user is caused, the function units of the two hot keys positioned at the symmetrical point are exchanged, and the user does not need to memorize the positions of the hot keys of the function units again when using the drawing device;
meanwhile, the common use degrees of different functional units are different, so that the functional unit with the highest common use degree is arranged and kept at the uppermost hot key position, and the use of a user is facilitated.
Preferably, the drawing device is coupled to a computer, the touch screen plate is a centrosymmetric graph, and image units are uniformly distributed on a display screen of the computer;
each sensing unit is simultaneously coupled with two different image units, the two image units coupled with the same sensing unit are called an image unit group, the two sensing units positioned at symmetrical points are respectively called a sensing unit A and a sensing unit B, the sensing unit A and the sensing unit B are coupled with the same image unit group, the sensing unit A controls one image unit in the corresponding image unit group, and the sensing unit B controls the other image unit in the corresponding image unit group;
the change-over switch is also coupled between the image unit and the induction unit and is used for interchanging the image units controlled by the induction unit A and the induction unit B.
By adopting the technical scheme, when the drawing device is used, the image can be directly displayed on the touch screen plate, and the drawing device can also be connected to a computer, and the image can be displayed on the display screen of the computer;
when a computer display screen is used for displaying images, the relative position of a pressure sensing pen on the surface of the touch screen panel is mainly determined through a sensing unit, and the position is input to a computer in a data form, so that an image unit of the computer is positioned at the corresponding position of the computer display screen according to the position data of the corresponding sensing unit on the touch screen panel; then, according to the position change of the pressure-sensitive pen on the surface of the touch screen plate, corresponding change movement is carried out on the display screen to form the same drawing image as that on the touch screen plate;
for the touch screen module, on the basis that the drawing device is integrally rotated by 180 degrees, if the corresponding relationship between the sensing unit and the image unit is not changed, the sensing unit located at the upper right of the touch screen plate actually corresponds to the image unit at the lower left of the display screen, and the image made on the touch screen plate is also reversed with the image of the computer display screen. Therefore, by switching the switch, the image cells corresponding to the two sensing units at the symmetrical point are interchanged, which is equivalent to rotating the image cells by 180 degrees, thereby rotating the inverted image back to the normal viewing angle.
Preferably, the hot key module further comprises a roller, and the roller is located at the symmetrical center of the centrosymmetric figure formed by the hot key arrangement.
By adopting the technical scheme, when the drawing device is connected with the computer, the corresponding relation between the sensing unit and the image unit is actually that the position of a cursor on the computer is controlled by the position of the pressure-sensitive pen, so that a part of functions of the mouse can be replaced by the drawing device, but the mouse is also provided with the roller wheel, so that the roller wheel function of the mouse is realized by correspondingly arranging the roller wheel on the drawing device, and the use habit of a user is met.
Preferably, a plurality of the hot keys are connected to the opening side of the housing.
Through adopting above-mentioned technical scheme, for the convenience of user's touching use, generally need be great with the hotkey setting, but in order to guarantee that electronic product is light, thin advantage, set up great hotkey at the thickness face of casing, will increase the thickness of casing, consequently set up the hotkey in the opening side of casing in this application, need not to increase the thickness of casing for setting up the hotkey, and the touch screen board also is located the opening side of casing, when making the user touch screen board drawing, use hotkey that can be convenient.
Preferably, change over switch includes that a plurality of relays, a plurality of relays of control are simultaneously got to the electricity or the toggle switch of outage simultaneously, every the relay all includes coil, normally open contact switch, normally closed contact switch, just relay and hotkey one-to-one, normally open contact switch coupling are in one of them functional unit of the functional unit group of corresponding hotkey, and normally closed contact switch coupling is in another functional unit of the functional unit group of corresponding hotkey.
By adopting the technical scheme, the on-off state of the normally open contact switch and the normally closed contact switch is switched by the power-on and power-off of the relay, so that the function units electrically connected with the hotkeys are switched, and the switching of the function units is realized.
Preferably, the hot key includes the button shell, connects in the electron signboard of button shell, the electron signboard includes a plurality of identification symbols, identification symbol and functional unit one-to-one, just the identification symbol that the electron signboard shows changes along with the functional unit changes.
By adopting the technical scheme, as the functional units corresponding to the hot keys are changed, if the marks are not changed, the marks are inconsistent with the actual functions, and troubles are brought to users, so that the electronic signboard is used for marking, and the marks on the hot keys are changed along with the change of the functional units corresponding to the hot keys, so that the functional units are consistent with the marks.
Preferably, the shell is provided with a hidden groove, and the change-over switch is arranged in the hidden groove.
Through adopting above-mentioned technical scheme, because change over switch is used for carrying on the switching of left side and being used to hand and right side to be used to hand, so be not a function of daily often used, consequently set up and hide the groove and hide change over switch, avoid user's mistake to touch.
Preferably, the casing is equipped with the closing cap in the open position of hiding the groove, the closing cap articulates in the casing through the axis of rotation to be equipped with the torsional spring in axis of rotation department, the one end of torsional spring is connected in the closing cap, and the other end is connected in the casing, when the torsional spring is in original state, the closing cap keeps closing and hides the groove.
Through adopting above-mentioned technical scheme, use the closing cap to seal and hide the groove, avoid dust or debris to get into and hide the groove, lead to hiding the change over switch in the groove and touched by the mistake to use the torsional spring to guarantee that the closing cap is in the state of sealing and hiding the groove all the time.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the switching module, the position of the hot key is switched after the drawing device is rotated, so that users with both left and right dominant hands can conveniently use the hot key;
2. through the arrangement of the switching module, after the drawing device is rotated, the sensing unit on the touch screen plate is enabled to be corresponding to the image unit on the computer display screen again, and therefore the rotated and inverted image is rotated back to the normal visual angle.
Drawings
FIG. 1 is a schematic structural view of example 1.
Fig. 2 is a front view of embodiment 2.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is an enlarged view of a portion B of fig. 3.
Fig. 5 is a circuit diagram of embodiment 3.
Description of reference numerals: 1. a touch screen module; 11. a touch screen panel; 2. a housing; 21. hiding the groove; 22. a closure cap; 23. a torsion spring; 3. a hot key module; 31. a hot bond; 32. a roller; 4. a switch; 5. a normally open contact switch; 6. a normally closed contact switch.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
Example 1:
the embodiment of the application discloses a drawing device which is generally used for right-handed or left-handed use. Referring to fig. 1, the touch screen module includes a main body module, a touch screen module 1 connected to the main body module and used for drawing in cooperation with a pressure sensitive pen, a hot key module 3 with various common functions preset, and a switching module for switching between a left-handed user and a right-handed user.
The touch screen module 1 is similar to a touch screen of a smart phone in principle, the touch screen module 1 comprises a touch screen plate 11 and sensing units uniformly distributed on the surface of the touch screen plate 11, and the sensing units are used for sensing the pressing position and the pressing force of a pressure sensing pen, so that the mouse drawing mode of computer software is distinguished, and a user can draw pictures with higher standards.
The main body module comprises a shell 2, a CPU provided with a plurality of functional units and a connecting circuit for connecting the CPU and the other functional modules. One side of the housing 2 is open, and the other side is closed, the open side of the housing 2 is called the open side, the touch panel 11 is connected to the open side and seals the opening, so that a sealed cavity is enclosed by the touch panel 11 and the housing 2, and the CPU and the connection circuit are both located in the cavity and protected by the housing 2 and the touch panel 11.
The hot key module 3 includes a plurality of hot keys 31, and the hot keys 31 are all connected to the opening side of the housing 2, and for a right-handed user, the hot keys 31 are generally disposed on the left-hand side of the housing 2, and the left-hand side performs an auxiliary operation. The common functions of the hot keys 31 generally include erasing, enlarging, reducing, clockwise rotating the image, counterclockwise rotating the image, re-orienting, resetting the position, etc., and the common degrees of the different functions of the hot keys 31 are different, so the functions of the hot keys 31 are arranged, and the most common functions of the hot keys 31 are arranged at the uppermost hot key 31, which is convenient for the user to memorize and use.
When the drawing device is connected with a computer, if a mouse is required to be operated to control a computer cursor at the same time, the operation is troublesome, so that the drawing device is generally used for realizing the function of the mouse. Specifically, the relative position of the pressure-sensitive pen on the surface of the touch screen plate 11 is determined through the sensing unit, and the position is input to the computer in the form of data, so that the cursor of the computer is positioned at the corresponding position of the computer screen according to the data of the relative position of the pressure-sensitive pen on the surface of the touch screen plate 11. And then, the cursor correspondingly changes and moves according to the position change of the pressure-sensitive pen on the surface of the sensing plate, so that the function similar to that of a mouse for controlling the computer cursor is formed.
However, most mice are provided with a scroll wheel 32, and in order to meet the use habit of the user, the scroll wheel 32 is correspondingly provided on the hot key module 3 to realize the functions of the scroll wheel 32 of the mouse, for example, when the scroll wheel 32 is rotated clockwise and the scroll wheel 32 is rotated counterclockwise, the enlargement and reduction of the image, or the rotation of the angle of view of the image, etc. are controlled respectively.
When switching between the left and right dominant hands, the drawing device is firstly rotated by 180 degrees, the positions of the hot key 31 and the roller 32 are rotated along with the casing 2, and the left-hand side of the casing 2 is rotated to the right-hand side of the casing 2, so that a user of the left dominant hand can conveniently use the right hand to perform auxiliary drawing.
However, although the position of the hot key 31 is turned to the convenient position of the left dominant hand, the position of the hot key 31 is reversed after the turning, and for example, one hot key 31 originally located at the upper left position of all the hot keys 31 and the functional units represented by the hot key 31 in the right dominant hand state is turned to the lower right position of all the hot keys 31, which is inconsistent with the above-mentioned "setting the most frequently used hot key 31 function at the uppermost hot key 31", and causes inconvenience for the user. For the old user, it is also necessary to memorize the position of the hot key 31 corresponding to the required function after rotation, which is very inconvenient.
Therefore, a switching module is provided, and the position of the hot key 31 is also switched by the switching module after the drawing device is rotated, so that the relative position of the hot key 31 is kept inconvenient.
Specifically, a plurality of hot keys 31 are arranged on the housing 2 in a centrosymmetric pattern, and the roller 32 is arranged at the symmetric center of the centrosymmetric pattern, so that the key arrangement patterns of the hot key module 3 are kept consistent before and after rotation, and the use by a user is facilitated.
Meanwhile, on the functional unit corresponding to the hot key 31, the hot key 31 corresponds to the functional unit two by two, each hot key 31 is coupled to two different functional units at the same time, and each functional unit is also coupled by two hot keys 31 at the same time. For example, two function units coupled to the same hot key 31 are referred to as a function unit group, two hot keys 31 located at symmetrical points are referred to as a hot key a and a hot key B, respectively, the hot key a and the hot key B are coupled to the same function unit group, the hot key a controls one function unit of the corresponding function unit group, and the hot key B controls the other function unit of the corresponding function unit group.
The switch module includes a switch 4 coupled between the function unit and the hot key 31, the switch 4 uses a contact switch and is connected to one side of the housing 2, and after switching by using the switch 4, the function units controlled by the hot key a and the hot key B are exchanged. Since the hotkey a and the hotkey B are at the symmetrical points of the central symmetrical image, it is equivalent to rotate all the functional units corresponding to the hotkey 31 by 180 degrees, and the functional units are returned to the positions corresponding to the hotkey 31 before the drawing device is rotated.
Similarly, if the drawing device is coupled to a computer for drawing and displaying, after the drawing device is rotated, since the sensing unit rotates along with the touch screen plate 11 and the corresponding relationship between the computer display screen and the touch screen plate 11 is not changed, the subsequently drawn image on the touch screen plate 11 and the image actually generated by the computer may be reversed.
Therefore, the touch screen panel 11 is set to be rectangular, the computer display screen is uniformly divided into a plurality of image units, and the image units correspond to the sensing units of the touch screen panel 11 in pairs, that is, each sensing unit is coupled to two different image units at the same time, and each image unit is also coupled to two sensing units at the same time.
Two image units coupled with the same sensing unit are called an image unit group, a rectangle is a central symmetrical graph, two sensing units positioned at symmetrical points are respectively called a sensing unit A and a sensing unit B, the sensing unit A and the sensing unit B are coupled with the same image unit group, the sensing unit A controls one image unit in the corresponding image unit group, and the sensing unit B controls the other image unit in the corresponding image unit group.
When the change-over switch 4 is used for switching over, the image units corresponding to the sensing units a and B are interchanged, and because the sensing units a and B are located at the symmetrical point, the image units are also rotated 180 degrees, so that the image correspondence relationship which is already reversed is converted back to the correspondence relationship of the normal viewing angle.
The implementation principle is as follows: when the left hand and the right hand are switched, firstly, the whole drawing device is rotated by 180 degrees, at the moment, the positions of the hot key 31 and the touch screen plate 11 are rotated along with the shell 2, and the left hand and the right hand are rotated from the habitual position of the right hand to the habitual position of the left hand, so that a user with the left hand can conveniently use the drawing device;
then, the switch 4 is toggled, the corresponding function units of the two hotkeys 31 located at the symmetrical points are exchanged through the switch 4, and the corresponding image units of the two sensing units located at the symmetrical points are exchanged at the same time, so that the user of the left dominant hand can normally use the switched drawing device.
Therefore, as shown in fig. 4, in the present embodiment, a rectangular hidden slot 21 is opened on one side of the housing 2, and the switch 4 is disposed in the hidden slot 21 to protect the hidden slot 21 and prevent the user from touching the hidden slot by mistake.
In order to further protect the switch 4, the housing 2 is provided with a closing cover 22 for closing the hidden slot 21 at the opening position of the hidden slot 21, and the closing cover 22 is also rectangular and is hinged to the housing 2 through a rotating shaft. Meanwhile, in order to prevent the closing cap 22 from shaking and ensure the sealing stability of the closing cap 22, a torsion spring 23 is provided at the rotation shaft. The torsion spring 23 has one end connected to the closing cap 22 and the other end connected to the housing 2, and the closing cap 22 keeps closing the hiding groove 21 when the torsion spring 23 is in the original state.
When the switching is required, a rod with a smaller diameter can be used to move towards the bottom of the hidden slot 21, and the rod first pushes the closing cover 22 to unscrew towards the inside of the hidden slot 21, and then the rod continues to move until the switch 4 is touched to operate the switch 4.
The relay and hotkey 31 one-to-one, every relay all includes the coil, normally open contact switch 5, normally closed contact switch 6, normally open contact switch 5 is coupled in one of them functional unit of the functional unit group that corresponds hotkey 31, normally closed contact switch 6 is coupled in another functional unit of the functional unit group that corresponds hotkey 31, thereby when toggle switch's on-off state conversion, the coil received the electricity, the outage state converts thereupon, make normally open contact switch 5, normally closed contact switch 6's on-off state conversion, finally make hotkey 31 and the functional unit disconnection of the preceding electricity of conversion, make hotkey 31 and the functional unit electricity that does not link before the conversion link.
Similarly, the sensing unit and the image unit can be switched.
Specifically, the hot key 31 includes a key casing, the electronic signboard is connected to the outward side of the key casing, and the display screen of the electronic signboard is parallel to the touch screen panel 11. The electronic signboard is coupled with the CPU, and when the functional unit corresponding to the hot key 31 changes, the identification symbol of the electronic signboard also changes, so that the functional unit and the identification symbol are kept consistent.
Claims (8)
1. A drawing device generally usable with either right-handed or left-handed use, comprising:
the touch screen module (1) comprises a touch screen plate (11) and sensing units uniformly distributed on the touch screen plate (11), wherein the sensing units are used for sensing the pressing position of a pressure sensing pen;
the main body module comprises a shell (2) and a CPU (Central processing Unit) positioned in the shell (2), wherein one side of the shell (2) is provided with an opening which is called as an opening side, and the other side of the shell (2) is closed; the touch screen plate (11) is connected to the opening side of the shell (2), and the touch screen plate (11) is coupled with the CPU;
the hot key module (3) comprises a plurality of hot keys (31) connected to the shell (2), the figure formed by the arrangement of the hot keys (31) is a centrosymmetric figure, the CPU is provided with a plurality of functional units, and each hot key (31) is coupled to two different functional units at the same time; two function units coupled by the same hot key (31) are called as a function unit group, two hot keys (31) positioned at symmetrical points are respectively called as a hot key A and a hot key B, the hot key A and the hot key B are coupled to the same function unit group, the hot key A controls one function unit in the corresponding function unit group, and the hot key B controls the other function unit in the corresponding function unit group;
the switching module comprises a switch (4) arranged on the shell (2), and the switch (4) is coupled between the function unit and the hot key (31) and used for interchanging the function units controlled by the hot key A and the hot key B.
2. A drawing device generally adapted for right-handed or left-handed use according to claim 1, wherein: the drawing device is used for being coupled with a computer, the touch screen plate (11) is a centrosymmetric graph, and image units are uniformly distributed on a display screen of the computer;
each sensing unit is simultaneously coupled with two different image units, the two image units coupled with the same sensing unit are called an image unit group, the two sensing units positioned at symmetrical points are respectively called a sensing unit A and a sensing unit B, the sensing unit A and the sensing unit B are coupled with the same image unit group, the sensing unit A controls one image unit in the corresponding image unit group, and the sensing unit B controls the other image unit in the corresponding image unit group;
the change-over switch (4) is also coupled between the image unit and the induction unit and is used for interchanging the image units controlled by the induction unit A and the induction unit B.
3. A drawing device generally adapted for right-handed or left-handed use according to claim 2, wherein: the hot key module (3) further comprises a roller (32), and the roller (32) is positioned at the symmetrical center of a central symmetrical figure formed by the arrangement of the hot keys (31).
4. A drawing device generally adapted for right-handed or left-handed use according to claim 1, wherein: the plurality of hot keys (31) are connected with the opening side of the shell (2).
5. A drawing device generally adapted for right-handed or left-handed use according to claim 1, wherein: change over switch (4) are including a plurality of relays, control a plurality of relays and are got electric or the toggle switch of outage simultaneously, every the relay all includes coil, normally open contact switch (5), normally closed contact switch (6), just relay and hotkey (31) one-to-one, and normally open contact switch (5) are coupled in one of them functional unit of the functional unit group of corresponding hotkey (31), and normally closed contact switch (6) are coupled in another functional unit of the functional unit group of corresponding hotkey (31).
6. A drawing device generally adapted for right-handed or left-handed use according to claim 1, wherein: the hot key (31) comprises a key shell and an electronic signboard connected to the key shell, wherein the electronic signboard comprises a plurality of identification symbols, the identification symbols correspond to the functional units one by one, and the identification symbols displayed by the electronic signboard change along with the change of the functional units.
7. A drawing device generally adapted for right-handed or left-handed use according to claim 1, wherein: the shell (2) is provided with a hidden groove (21), and the change-over switch (4) is arranged in the hidden groove (21).
8. A drawing device generally adapted for right-handed or left-handed use according to claim 7, wherein: casing (2) are equipped with closing cap (22) in the open position of hiding groove (21), closing cap (22) pass through the axis of rotation and articulate in casing (2) to be equipped with torsional spring (23) in axis of rotation department, the one end of torsional spring (23) is connected in closing cap (22), and the other end is connected in casing (2), when torsional spring (23) are in original state, closing cap (22) keep closing and hide groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022288773.8U CN212873452U (en) | 2020-10-14 | 2020-10-14 | Drawing device generally used for right-handed or left-handed use |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022288773.8U CN212873452U (en) | 2020-10-14 | 2020-10-14 | Drawing device generally used for right-handed or left-handed use |
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| CN212873452U true CN212873452U (en) | 2021-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371789A (en) * | 2020-10-14 | 2022-04-19 | 深圳市精源宇科技有限公司 | Drawing device generally used for right-handed or left-handed use and implementation method |
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2020
- 2020-10-14 CN CN202022288773.8U patent/CN212873452U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371789A (en) * | 2020-10-14 | 2022-04-19 | 深圳市精源宇科技有限公司 | Drawing device generally used for right-handed or left-handed use and implementation method |
| CN114371789B (en) * | 2020-10-14 | 2024-04-23 | 深圳市精源宇科技有限公司 | Drawing device commonly used for right-handed or left-handed use and implementation method |
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